Osmolator Problem

[220reef]

I have had an osmolator for over a year now and have had no problems until recently. When the water level drops I am not getting a response from the sensor. If I take the sensor and dip it in the water and set it back up the pump starts filling and stops at the sensor just like it is suppose to. I have taken the sensor off and cleaned it also but that doesn't seem to be the issue. The sensor is located in a refugium sump which is lit 24hrs a day and I have also move the sensor to an area furthest from the light source in case that was causing the problem. Could this just be a faulty sensor?

 

[rvitko]

The light shouldn't be an issue. Have you cleaned it in vinegar? Try soaking it in vinegar overnight to remove all the mineral deposits. It sounds like it just has a film of calcium on it. When they fail they just don't work at all.